Engine oil.

[Mav122]

What oil would anyone suggest for a 4agze. Should I go all out on super dupa Castrol or is magnatec or similar ok?

[MartG]

Magnatec will be fine

[Mav122]

Would 10/40 or 15/40 be best? Was having this discussion with a friend the other day. Think we settled on 10/40 for UK but just wanted some opinions.

[cartledge_uk]

Would 10/40 or 15/40 be best? Was having this discussion with a friend the other day. Think we settled on 10/40 for UK but just wanted some opinions.

Depends really. YOu don't quite know how the engine was treated before you (in the 20 odd years) so i'd go 10/40, but then if your losing some go 15/40.

Personally I slapped in whatever was cheapest as I was bound to blow it up anyway regardless of whats in there *pats engine graveyard*

[MartG]

10W40 will be fine. If you're worried, Castrol do an oil designed for 'older engines' - can't remember what grade it is though

at Tim's 'engine graveyard' remark - having been present at least two of their demises

[Mav122]

Would 10/40 or 15/40 be best? Was having this discussion with a friend the other day. Think we settled on 10/40 for UK but just wanted some opinions.

Depends really. YOu don't quite know how the engine was treated before you (in the 20 odd years) so i'd go 10/40, but then if your losing some go 15/40.

Personally I slapped in whatever was cheapest as I was bound to blow it up anyway regardless of whats in there *pats engine graveyard*

10/40 it is then. I'm just rebuilding it and only painted block the other day, so it had better not be losing oil

[cartledge_uk]

Would 10/40 or 15/40 be best? Was having this discussion with a friend the other day. Think we settled on 10/40 for UK but just wanted some opinions.

Depends really. YOu don't quite know how the engine was treated before you (in the 20 odd years) so i'd go 10/40, but then if your losing some go 15/40.

Personally I slapped in whatever was cheapest as I was bound to blow it up anyway regardless of whats in there *pats engine graveyard*

10/40 it is then. I'm just rebuilding it and only painted block the other day, so it had better not be losing oil

Is it a full rebuild? If so, then it needs to be bedded in first with mineral oil, or bedding in oil.

[SuperRedMR2]

I use castrol 10/40 in mine since buying the mk1b mate

[D]

Hi

My oil pressure gauges shows lower pressures as some months before.
At last year we replaced the rod's bearing.

At idle(warm, about 900-1000rpm): oem between the 2. and the 3. line, with vdo oil pressure gauge: 1,5 bar !!!!!

Higher Idle 1200rpm about 2bar

3bar from about 2000rpm

Max pressure(5-6000): oem at the 3. line, vdo about 5bar.

My friend told me it's very bad for 4age

What should i do then?

Is the original gauge measuring correctly?

Are there anybody knows how much pressure means the 2.,3.,4. line?

[WeirdNeville]

I don't know any real correlation to oil pressures, or even if the oil pressure gauge is calibrated, but mine generally sits between 3 and 4 on your diagram when under load, getting to 4 at high revs. At idle it's about at 2-3.
I've always assumed that this is Ok, as my engine has worked fine for the last 10,000 miles and doesn't use any oil.

[oukie]

Ive never owned a mk1 that has been above 4 on your scale, My current cars all sit between 3 +4 when in normal driving conditions

[Ben]

Really? When idling, my gauge sits a bit below 2, whre cruising at about 2-2.5k rpm it sits dead centre, and when giving it the beans it will just about reach 3 on your scale.

Never had any engine issues though and it doesn't seem to use much oil
I never realised it was so low compared to other people's

[crazybrightman]

Hi

My oil pressure gauges shows lower pressures as some months before.
At last year we replaced the rod's bearing.

At idle(warm, about 900-1000rpm): oem between the 2. and the 3. line, with vdo oil pressure gauge: 1,5 bar !!!!!

Higher Idle 1200rpm about 2bar

3bar from about 2000rpm

Max pressure(5-6000): oem at the 3. line, vdo about 5bar.

My friend told me it's very bad for 4age

What should i do then?

Is the original gauge measuring correctly?

Are there anybody knows how much pressure means the 2.,3.,4. line?

im not sure what the specs are on an mr2 but that sound like spot on oil pressure to me. most engines are roughly the same.
for example on my recently rebuilt saab engine i get 1.4bar at idle and 2.8bar at 2000rpm which is bang on spec. as your engine has over that id say its in very good health.
10/40 will be fine just change it ever 6000 miles if you dont do many miles or drive it hard. for track use you may need to go upto a 50grade. semi synth is all you need.

[viperrr]

Really? When idling, my gauge sits a bit below 2, whre cruising at about 2-2.5k rpm it sits dead centre, and when giving it the beans it will just about reach 3 on your scale.

Never had any engine issues though and it doesn't seem to use much oil
I never realised it was so low compared to other people's

Mine is also like this... maybe we need to put a bit more oil in? Although I too have had no problems.

[Ben]

Really? When idling, my gauge sits a bit below 2, whre cruising at about 2-2.5k rpm it sits dead centre, and when giving it the beans it will just about reach 3 on your scale.

Never had any engine issues though and it doesn't seem to use much oil
I never realised it was so low compared to other people's

Mine is also like this... maybe we need to put a bit more oil in? Although I too have had no problems.

I doubt it... Its done about 8k miles like this (basically since I bought the car), with a full service about 1k miles ago and I check the oil regularly. It's always pretty much at the top of the dipstick. I'm hoping it's just the calibration of the guage

[D]

WeirdNeville: It looks the same as mine.

oukie: they told me the best is about 5,5-6 bar. Mine has 5 it's not to bad. I only afraid about the idle and lower rpm pressure. But with harder trackday use i will get lower pressures and this can effect big problems perhaps.

benedwards64: It doesn't mean too much that You see this. Maybe the oil pressure sender is wrong.

I forget to say I'm using 10w50liqui moly.

I afraid because my friend how told me it's quite bad, is a very experienced guy. He is building 4ag's for the Hungarian drift championship ae86's.
He told me as well i should use smallport oil pump (i have bigport now)
In this year I want to visit about 5-10 trackday...

Are you visit trackdays often?

[WeirdNeville]

I've done 2 trackdays, one at silverstone with the car on track for about 3-4 hours and 200 miles and the second at Brands Hatch with the car on track 2 hours and about 100 miles and the car loved it. Nothing has changed before or since and it used no oil all day in either case. I wasn't going easy on the old girl either

[jimi]

Mr T says oil pressure should be a minimum of 4.3 psi (0.29 bar) at idle
and between 36-71 psi (2.5-5 bar) at 3000 rpm, that checked with a proper gauge, not the dash gauge which isn't accurate, it's only meant to be used as a guide.

[Mav122]

I ended up putting 10w/40 Castrol super s in. It's run fine with no problems and my gauge sits just under half way at idle, about half way normal driving and just over the halfway a smidge when given the beans.